import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: ${USER}
 * Date: ${YEAR}-${MONTH}-${DAY}
 * Time: ${TIME}
 */
public class Main {
    public static int num1;
    public static int num2;
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        num1 = scan.nextInt();
        num2 = scan.nextInt();
        Exchange exchange = new Exchange();
        exchange.exchange(num1,num2);
        System.out.println("num1:" + num1 + " num2:" + num2);
    }
}